Software reliability plays a vital role in the emerging field of digitalization. Everyone wants cost and time-efficient software along with reliability which is achieved using CBS. In CBS, if the individual components are computed for a large or complicated system, then integration becomes complex which results in difficulty in predicting CBSR. To solve this problem several computational intelligence techniques such as SVM, ACO, PSO, ABC, GA, Neural network, are used but in our paper, we have focused on optimization techniques Fuzzy, ACO, ABC, PSO. These techniques help in estimating and predicting reliability models for CBS. Also, we have done, an assessment and comparative analysis based on a literature review of ABC, ACO, and PSO that have also been presented, for choosing suitable parameters for software reliability modeling.